Shifts from 2nd and up are super smooth on the Yamaha R3. 1st is a little bit clunky but that's no fault to the system, it's just the bike size I believe. Shifting at WOT is now much more streamlined and there's not a way you can miss a shift. It's just so smooth and safer IMO. Great product and amazing customer service and instructions and tips.
I race on the CMRA series, and I've been using this product for the last 5 years, on my sprint bike (Suz GSXR 1000), and last 2 years in our Endurance bike (Yam R3). My experience with it has been great - the adjustability (sensitivy and kill time) is great, the strain gauge sensor works flawlessly and the shifting is accurate and super smooth.
Great product and their customer service is simply outstanding!